Wire and cord testing machine



(No Model.) 2 Sheets-Sheet 1.

0. WHEELER, Jr. WIRE AND CORD TESTING MACHINE. No. 244,962. Patented July 26,1881.

minesses $4W4 (No Model.)' 2 SheetsSheet 2.

0. WHEELER, Jr. WIRE AND 0031) TESTING MACHINE.

N0. 244,962. Patented July 26,1881. Fig. 2 129.,42 3.

I I 1 x HIM min asses UNITED STATES PATENT Ounce.

CYRENUS \VHEELER, JR, OF AUBURN, NEW YORK.

WIRE AND CORD TESTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 244,962, dated July 26, 1881.

Application filed March 11, 1881. (No model.)

To all whom it may concern:

Be it known-that I, GYRENUs WHEELER, Jr., of the city of Auburn, in the county of Cayuga and State of New York, have invented a new and useful Device for the Testing of the Tensile Strength of Cord or Twine and Wire, of which the following is a specification.

My invention relates more particularly to the testing of the tensile strength of cord or twine and wire such as is in general use upon self-binding harvestingmachines, and was suggested from the fact that an accurate knowledge of the strength of said material was necessary in order to secure the consumer of twine and wire for binding purposes from fraud and imposition of an inferior article, as well as to avoid the delay and annoyance caused by the use of such from breaking and continuous effectual working when binding grain in the harvest-field. I attain these objects by the mechanism illustrated in the accompanying drawings.

The several figures are drawn upon two sheets, and consist of Figure 1, which is a front elevation; Fig. 2, a rear elevation of the working parts; Fig. 3, a side or edge view of the same; Fig. 4, a sectional view of the bearings of the shaft; Fig. 5, a view of the indexed quadrant or seetor; Fig. 6, a view of the marker, and Fig. 7 an end view of the marker and section of the indexed quadrant.

Similar letters refer to similar parts throughout the several views.

A is a broad base or foot, having feet B B ateither end, and supports at its central point the upright post 0, which carries the working parts of my device. Near the upper end of the postO is secured, by means of the bolt Z and the screws T T, an iron plate, D, having a' hub or shell, (2, and a supporting-huh, 13, both of which pass completely through the post 0, and a recess or seat at the center of its upper en d for the admission of the supporting base of the indexed quadrant W.

Through the hub or shell 6 of the plate D passes a shaft, F, which is in diameter much smaller than the interior diameter of the hub, and between which and the inside of the hub or shell 0 is interposed a series of frictionrollers, f f, as shown in Fig. 4, Sheet 2, said rollers being thus placed to reduce the friction of the shaft to the smallest possible degree.

At one end of the shaft F is placed the grooved cord-sheave E, having a hook, Q, fastened thereto by means of screws n, and a marker-mover finger, U. The cord-sheave E has also a hub, Z, through which and the shaft F passes the pin m, thus securing the sheave firmly in position. At the other projeeting end of the shaft F is placed a disk, G, having ratchet-teeth 8 throughout the greater portion of its circumference, as shown in Fig. 2. This disk G has its bearing against the slightlyprojecting end of the hub or shell 0.

Passing onto the shaft F, and riveted to the disk G by the rivets h h, is the pendulumlever O, having a hub, it, through which and the shaft F passes the pin g, thus securing the position of the disk and the pei'ldulum-lever. The pendulum-lever O has secured to it, in a position determined from actual experiment, the pendulum-weight N, by means of the bolt P. At the center of the lower end of the pendulum-lever O is the leveling mark or notch 0.

R is a weighted pawl, acting automatically upon the ratchet-teeth s of the disk G, and is protected from sudden jar or strain by means of the hub B of the plate D, through which passes the bolt S, thus securing the proper and firm position of the weighted pawl R.

t is a rubber bumper for the lower end of the pendulum-lever O to strike against when the weighted pawl R is released from the ratchet-teeth s. This rubber bumper iis secured in its proper position upon the upright post 0 by means of the bolt j.

is a leveling pointer bent at right angles upon itself to admit of the passage between itself and the upright post 0 of the pendulumlever O, and is secured to the center of the post 0, and in proper perpendicular position by the screws 00.

H is a grooved cord-sheave, having a hook, K, and a ratchet, I. Interposed between the grooved cord-sheave H and the upright post 0 is the washer A, of sufficient thickness to bring the two cord-sheaves E and H in the same perpendicular plane. Through the sheave H, its ratchet I, the washer A, and the upright post 0 passes a belt or stud, J, having a flattened head, c, between which and the divisions of five pounds and upwards, as seen in Fig. 5, said divisions being determined from actual tests, and regulated in accordance therewith. The indexed quadrant W when in proper working position is placed immediately behind the outer end of the marker-mover finger D, as shown in Figs. 1 and 3. The indexed quadrant IV carries a movable marker, X, which has a projecting pin, 1), a friction-sprin g, 0,1ugs p and q, and an index-point d'constructed as shown in Figs. 6 and 7. This markerX is kept in place upon the quadrant by the lugs p and q, and by the action of the frictionspring upon the upper edge of the indexed quadrant is thus secured from slipping either backward or forward of itself, remaining wherever it may have been carried by the markermover finger U when ceasing to act. It is also prevented from being thrown ofi the indexed quadrant on the one hand by the projecting pin a attached thereto, and on the other hand by the interposition of the marker-mover finger itself.

Y represents the cord as attached to the cord-sheaves E and H while undergoing a test as to its tensile strength.

Having thus fully described the several parts of my invention and their construction, I will now explain their operation.

I first level up the machine by bringing the notch or mark 0, on the end of the pendulumlever O, in accurate opposition to the levelingpointer 70, and then tie one end of the cord or wire to be tested to the hook Q of the cordsheave E, and the other end to the hook K of the cord-sheave H. I now bring the hand-lever L with its dog M into action upon the ratchet I, and gradually press downward upon the handlever L. This action causes the cord-sheave H to turn, and through its connection with the upper cord-sheave E, by means of the cord or wire Y undergoing the test, causes E to move uniformly with it. As E is turned by said connection it carries with it the weighted pendulum-lever O and its weight N As the pendulum-lever is carried away from its center of gravity the strain upon the cord or wire is increased in direct proportion to its upward movement, until such time as the strain upon the cord orwire is so great as to cause it to break. At this moment the self-acting weighted pawl R prevents the weighted pendulum-lever 0 from falling a greater distance than one notch of the ratcheted disk G, and thus prevents any disturbance by jar or otherwise of the record of the marker X upon the indexed quadrant W.

During the above operation the cord-sheave E has carried with it the fixed marker-mover finger U, the point of which, bearing against the pin 2) of the marker X, serves to push the latter along on the indexed quadrant W. It will thus be seen that wherever the marker may be at the time when the tensile strain upon the cord or wire has caused it to break, there it will remain afaithfulrecorder of the tensile strength brought to bear upon the cord or wire during the testing operation.

Having thusdescribed the construction and operation of my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination, in a machine for testing the tensile strength of cord or wire, of the indexed qnad'ran t, the marker claspin g said quadrant and moving over the same, the vibrating arm or finger for moving said marker, and the weighted pendulum-lever for actuating said finger, substantially as described.

2. The combination of the plate D and hub or shell 0 with the friction-rollers ff, shaft F, and weighted pendulum-lever O, substantially for the purpose specified and set forth.

3. The combination of the weighted pendulum-lever supported on an upright post, with the rubber bumper 'i, and the leveling-pointer 7a, substantially as described, and for the purpose specified.

4. The combination of the ratcheted disk and weighted pawl with the shaft F and the weighted pendulum-leverO, substantially as described and set forth.

5. The upright post, havingabroad base, and supporting the cord-sheaves, rubber bumper, leveling;pointer, shaft and friction rollers, plate and'hubs, indexed quadrant, marker-mover finger and movable marker, ratcheted disk and weighted pawl, and weighted pendulum-lever, the whole constructed and combined with the hand-lever L and dog attached thereto for joint operation, substantially as described and specified.

0. WHEELER, JR. Witnesses:

J. M. YZNAGA, ALEx. MAHoN. 

